Multichain OP: Make pricing feed more robust

[bye43]

Optimism: Looks like there was a liquidity deposit of ~$13.5mil USDC on Nov-11-2022 which was later withdrawn on Nov-14-2022, so the spike in TVL looks legit. However, the pricefeed only gives prices for USDT, USDC, WETH, WBTC, DAI, and FRAX, zero otherwise. Hence, USD fields for all other pools are zero.